The average train between Luton and Carmarthen takes 5h 7m and the fastest train takes 4h 34m. There is a train service every few hours from Luton to Carmarthen. The journey time may be longer on weekends and holidays; use the search form on this page to search for a specific travel date.
Trains run hourly between Luton and Carmarthen. The earliest departure is at 5:43 AM in the morning, and the last departure from Luton is at 9:43 PM which arrives into Carmarthen at 6:47 AM. All services require a transfer at Farringdon and take an average of 5h 7m. The schedules shown below are for the next available departures.



4h 44m • 3 changes



4h 48m • 3 changes



4h 42m • 3 changes



4h 46m • 3 changes



4h 48m • 3 changes



4h 53m • 3 changes



4h 44m • 3 changes



4h 43m • 3 changes



4h 48m • 3 changes



4h 53m • 3 changes



4h 44m • 3 changes



4h 43m • 3 changes



4h 48m • 3 changes



4h 53m • 3 changes



4h 44m • 3 changes



4h 43m • 3 changes
Want to know about travelling from Luton to Carmarthen? We have put together a list of the most frequently asked questions from our users such as: What is the cheapest mode of transport? What is the quickest option? How much do tickets usually cost? and many more.
No, there is no direct train from Luton to Carmarthen. However, there are services departing from Luton station and arriving at Carmarthen station via Farringdon. The journey, including transfers, takes approximately 5h 7m.
Luton to Carmarthen train services, operated by Thameslink, depart from Luton station.
Luton to Carmarthen train services, operated by Thameslink, arrive at Carmarthen station.
Book your Luton to Carmarthen train tickets online with Thameslink, Elizabeth Line (TfL) and 2 other operators.
The distance between Luton and Carmarthen is 266.9 km. The road distance is 412 km.
You can take a train from Luton to Carmarthen via Farringdon, Farringdon Without, London Paddington, and Swansea in around 5h 28m.